Set in a tumultuous period where the political scene is murky and various people fought to gain power and the throne, the young king will do anything to strengthen his shaky position in court. His childhood friend Baek Rok leads a secret military force loyal to the king, called the "Black Cloud Swords." Baek Rok lives for his king, his brother Baek Kyul and his lover Jung Yeon, but when his ambitious brother betrays him and leads him into a trap, he finds himself on the run. He becomes a slave and gladiator, eventually returning to Joseon to seek revenge.

An old but unmarried man lives in the countryside. He is a poet on his way to sell a cow. Unexpectedly, the man heads to a friend's funeral. Along the way his ex-lover (played by Kong Hyo-Jin) accompanies the man and his cow ...

Dong-chul can’t fight at all, but he’s a gangster who can talk. He can’t show off his skills as well as before, but his spirit is still alive. But the girl who seems nice on the outside moves next door, and she doesn’t feel threatened by him. If he calls her “the girl next door,” she gets defensive. But for some reason, he wants to be nice to her! Se-jin has put herself out on the job market. She has big plans and got the semi-basement room. But a gangster who doesn’t even look like one lives next door. This man calls her “the girl next door” as if he knows her. The gangster that talks too much. She doesn’t hate him!

Chang-Hyok Choi (Park Shin-Yang) is driving in his car, when he suddenly finds himself followed by the police. In a nice car chase he tries to get away, but as his car emerges from a tunnel it goes over the side, down a cliff and he is killed in the burning wreck.The reason he tried to get away, is that he had just left the Bank of Korea, where he was part of a scam, that got him and his four accomplices the neat sum of 5 billion won. He died, one of his accomplices was caught, and the other three disappeared – and so did all the money.Eol-mae (Lee Mun-Shik) was the one caught by the police, and they try to get him to talk and reveal the scam and his accomplices. In flashbacks we see how the plan was hatched, and get to know the criminals.The police tries to find out more about the killed Chang-Hyok Choi, and find his brother, who is the owner of a used book store. He has been at odds with his deceased brother, but now gets a big life insurance.This interests In-keong Seo (Yum Jung-Ah) very much. She has been living with Mr. Kim (Baek Yun-Shik), who is a veteran con-artist and the money-man in the scam. In-keong Seo got to know Chang-Hyok Choi – and now wants to get to know his brother.